Oil advice and recommendations here!

hi, hope you recommend an oil for a motorbike. I have a Honda Cbr 600, 1999, 17000 miles. The only mods are dynojet kit, k+n air filter, carbon can. The bike is garaged at the minute an hasn't been started for 3 months. I'm looking to change the oil just before it goes back on the road in March. Was thinking of flushing through with a cheap oil from halfords before putting quality oil in, would this be recommended? The bike might visit a track this year, but the majority of riding will be fast road on a 12 mile commute during the week and long runs at the weekend. The last service by the previous owner was at 13000, and Comp 4 oil was used?

What´s the best oil for this car, considering that I live in Venezuela (where it´s summer all year long, and temps are always around 18C - 35C)?

The prior owner used Shell Helix Plus SemiSynthetic oil 15W-40. I think this may be a little thick for this engine because the engine shakes a little in idle when started cold.

I would like to move over to fully synthetic (maybe Mobil 1), BUT a friend of mine who is a mechanic told me that changing oil from a semisynthetic to a full-synthetic one will damage de engine's valves... is this true?

According to my book you will need a 5w-30 oil meeting the ACEA A3 spec.

Being out in higher ambient temps I would still stick with a 5w/10w-30. Most of these are semi synthetic and should be changed every 5,000 miles or so. If you can find a full synthetic 5w-30 you are looking at 10,000 miles.

One last question. Is there a special procedure for changing from semisynthetic to full synthetic? or should I tell the people in the service station to just pour out the semi and fill it with the new oil?

In my country it seems that 5W-50 synthetic oils are the norm, I don't know if it's because of the higher temperatures, but almost every full synthetic oil comes in 5W-50. I don't know it it's "better" or "worse" that the 5/10W-30 you said it's recommended for my astra coupe. But should it be ok to use this oil for my car? or the "50" grade is just too thick for this engine?. If it is i'll continue searching.

For the engine oil you have choices. Either 10w-40 semi-syn or 5w-40 synthetic.

The gearbox is more complicated so please let me know the label colour and I will recommend an appropriate oil. The notes are as follows:

Manual gearboxes: units with orange label with wording 'ATF Oil', TQD units with green label with wording 'Special Oil', REFER TO MAIN DEALER. The labels are located next to the oil filler plug

Manual gearbox units with yellow label with wording 'MTF-LT-1': REFER TO MAIN DEALER units with yellow label with wording 'MTF-LT-2': GO PN BMW 031 units with no label: EP 80W. The labels are located next to the oil filler plug

Hi, I’ve just brought a bmw e34 m5 3.8 and I’m after a bit of oil advice, I’m giving it a full service and changing all the fluids but I’m having some difficulty finding out what oil to put in the diff (LSD), And the gearbox (the gearbox has an orange label with wording “ATF OIL!”The handbook says “authorized bmw service stations know the grade”

For the diff, have a look at the Castrol SAF XJ, this is the BMW longlife 75w-140 for their LSD's.

Fuchs Titan ATF4000 is fine if the gearbox requires an ATF.

For the engine, if it is just commuting and fast road use I would look at a BMW approved 5w-40 full synthetic,if the car is driven hard or used on track then look at a 10w-50, Silkolene and Motul are tops and BMW approved.

Hope someone can help me out I'm a bit of a noob with performance engines (previously owned a '93 rover 214 and an '87 fiesta). I've just bought a 1994 (L) Honda CRX Del Sol VXi (Japanese import) with a 1.5 SOHC VTEC Engine.

It's a good little car with an apparently bulletproof engine but it sounds a bit like a diesel at the moment. The noise is coming from the valves and it sounds like they are just flapping around in there. The noise is worst when the engine is cold. The fella i got it off said that it started sounding like that after the last oil change when his mechanic, for reasons best known to himself, put in a part synthetic 10w 40 instead of his usual fully synthetic 5w 40. So I have 3 questions.

1) Could this change in oils have caused the diesel sounding problem?

2) What oil should I be using for this engine given that I do about 5000 miles a year mostly in town?

3) Should I use an engine flush (Forte Advanced Motor Flush Maybe?) before I upgrade to a fully synthetic from the part synthetic?

Very grateful to anyone who could shed some light on any of these questions for me

Hope someone can help me out I'm a bit of a noob with performance engines (previously owned a '93 rover 214 and an '87 fiesta). I've just bought a 1994 (L) Honda CRX Del Sol VXi (Japanese import) with a 1.5 SOHC VTEC Engine.

It's a good little car with an apparently bulletproof engine but it sounds a bit like a diesel at the moment. The noise is coming from the valves and it sounds like they are just flapping around in there. The noise is worst when the engine is cold. The fella i got it off said that it started sounding like that after the last oil change when his mechanic, for reasons best known to himself, put in a part synthetic 10w 40 instead of his usual fully synthetic 5w 40. So I have 3 questions.

1) Could this change in oils have caused the diesel sounding problem?

2) What oil should I be using for this engine given that I do about 5000 miles a year mostly in town?

3) Should I use an engine flush (Forte Advanced Motor Flush Maybe?) before I upgrade to a fully synthetic from the part synthetic?

Very grateful to anyone who could shed some light on any of these questions for me